Using @decorator with methods

method_as_decorator.py

# Say we have this
class BaseCache(object):
    def cached(self, timeout=None):
        """A decorator for caching function calls"""
        def decorator(func):
            @wraps(func)
            def wrapper(*args, **kwargs):
                cache_key = get_key(func, args, kwargs)
                try:
                    result = self.get(cache_key)
                except CacheMiss:
                    result = func(*args, **kwargs)
                    self.set(cache_key, result, timeout)
                return result
            return wrapper
        return decorator


# We can make it look this with a decorator
class BaseCache(object):
    @decorator
    def cached(call, self, timeout=None):
        """A decorator for caching function calls"""
        cache_key = get_key(call._func, call._args, call._kwargs)
        try:
            result = self.get(cache_key)
        except CacheMiss:
            result = call()
            self.set(cache_key, result, timeout)
        return result


# Basic idea: self is just a decorator argument